Toxrill, the Corrosive (Promo Pack) [Innistrad: Crimson Vow Promos] High-Speed Riders It has "This creature's power

It has "This creature's power and toughness are each equal to the number of experience counters you have

Set: Return of the Duelist Card type: Xyz/Effect Monster Rarity: Secret Rare Attack: 2300 Defense: 1500 2 Level 4 monsters Once per turn: You can detach 1 Xyz Material from this card

/ Where Sleeping Dragon unveiled Han's partition:

If the player does

Toxrill, the Corrosive (Promo Pack) [Innistrad: Crimson Vow Promos] High-Speed Riders It has "This creature's powerSet: Innistrad: Crimson Vow Promos Type: Legendary Creature Slug Horror Rarity: Mythic Cost: {5}{B}{B} At the beginning of each end step, put a slime counter on each creature you don't control. Creatures you don't control get 1 1 for each slime counter on them. Whenever a creature you don't control with a slime counter on it dies, create a 1 1 black Slug creature token. {U}{B}, Sacrifice a Slug: Draw a card.